n.
Function: adverb
Date: 14th century
1 a : to, toward, or at the rear b : in or into the past : backward in time also : AGO c : to or at an angle off the vertical d (1) : under restraint (2) : in a delayed or retarded condition
2 a : to, toward, or in a place from which a person or thing came b : to or toward a former state c : in return or reply